He was probably so sad himself, but he was working so hard to lift his hyung's mood up, this fool. He kept consoling and congratulating the others... He was a hyung babo since the end and it breaks my heart. Seonho really likes Minhyun hyung, but this chemistry is going to end and it makes me even sadder

It's not like he has no tact and just wants to joke around. You could feel that he knew that Minhyun was sad so he went and consoled him. He doesn't act that way with his other hyungs but acts that way because it was Minhyun hyunh. He kept coming back 3-4 times and hugged him and wiped away his tears. But it wasn't in vain because at the end, Minhyun finally smiled. He kept staying next to him and he kept taking care of him until it ended.. I'll wait for you no matter how long and what you become